Electronic vapor provision device

Abstract

An electronic vapor provision device comprises a body and a vaporizer. The body comprises a power cell and a processor, and the vaporizer is releasably connectable to the body. The processor is configured to enter a sleep mode when the vaporizer is connected to the body and the device is inactive for an inactive time. Furthermore, the processor is configured to leave the sleep mode and enter a usable mode when the vaporizer is disconnected from the body then reconnected to the body.

The invention claimed is: 
     
       1. An electronic vapor provision device body comprising:
 a battery assembly comprising a power cell and a computer, and configured to be releasably connectable to a vaporizer, 
 wherein the computer comprises:
 a computer processor, 
 a memory, and 
 an input-output device; 
 
 wherein the computer is configured to check whether the vaporizer is connected to the battery assembly, and in response to detecting the vaporizer is connected to the battery assembly, to enter or remain in a normal operation mode, 
 wherein the body comprises first and second battery assembly terminals configured such that when the vaporizer is connected to the body, the first battery assembly terminal is connected to a first vaporizer connection terminal and the second battery assembly terminal is connected to a second vaporizer connection terminal, and wherein the body further comprises a capacitor, and the computer is configured to first charge the capacitor and then detect whether the vaporizer is connected to the body by determining whether the capacitor is discharged. 
 
     
     
       2. The electronic vapor provision device body of  claim 1 , wherein the capacitor is connected in parallel with the first and second battery assembly terminals. 
     
     
       3. The electronic vapor provision device body of  claim 1 , wherein the computer is configured to send out a pulse and the capacitor is charged for a period of time equal to the width of the pulse. 
     
     
       4. The electronic vapor provision device body of  claim 3 , wherein the pulse is a square wave. 
     
     
       5. The electronic vapor provision device body of  claim 1 , wherein the electronic vapor provision device body comprises a digital multimeter or digital voltmeter connected in switched parallel to the capacitor, and wherein the computer is configured to check the charge of the capacitor by triggering the completion of the switched digital multimeter or digital voltmeter circuit and then receives information from the digital multimeter or digital voltmeter indicating a voltage across the capacitor resulting from the charge of the capacitor. 
     
     
       6. The electronic vapor provision device body of  claim 1 , wherein the computer is configured such that in response to the computer determining that the vaporizer is not connected to the battery assembly, the computer enters a sleep mode. 
     
     
       7. The electronic vapor provision device body of  claim 6 , wherein, during the sleep mode, the computer is configured to wake after a pre-determined time and check whether the vaporizer is connected to the battery assembly and, the computer is configured to enter sleep mode in response to detecting the vaporizer is not connected to the battery assembly. 
     
     
       8. A method of operating an electronic vapor provision device, wherein
 the electronic vapor provision device comprises a body and a vaporizer, wherein the device body comprises a battery assembly comprising a power cell and a computer; and 
 the vaporizer is releasably connectable to the body; 
 the method comprising the computer checking whether the vaporizer is connected to the battery assembly, and in response detecting the vaporizer being connected to the battery assembly, the computer causes the electronic vapor provision device to enter or remain in a normal operation mode, wherein the body comprises first and second battery assembly terminals configured such that when the vaporizer is connected to the body, the first battery assembly terminal is connected to a first vaporizer connection terminal and the second battery assembly terminal is connected to a second vaporizer connection terminal, and wherein the body further comprises a capacitor, and the computer is configured to first charge the capacitor and then detect whether the vaporizer is connected to the body by determining whether the capacitor is discharged.